CBSE Maths 12 Science MCQ Three Dimensional Geometry Answers in English to enable students to get Answers in a narrative video format for the specific question.

Expert Teacher provides CBSE Maths 12 Science MCQ Three Dimensional Geometry Answers through Video Answers in English language. This video solution will be useful for students to understand how to write an answer in exam in order to score more marks. This teacher uses a narrative style for a question from Three Dimensional Geometry not only to explain the proper method of answering question, but deriving right answer too.

Please find the question below and view the Answer in a narrative video format.

** Question:**

** Find the angle between the lines whose direction ratios are a, b, c and b - c, c - a, a - b. **

** Answer Video in** **English****:**

**Question 1** : If a line makes angles with the positive direction of co-ordinate axes, then write the value of (View Answer Video)

**Question 2** : If a line marks angles and with x, y and z-axis respectively, where is acute, then find . (View Answer Video)

**Question 3** : Find the angle between line and the plane 2x - y + 2z -13 = 0. (View Answer Video)

**Question 4** : Find the vector equation of the plane which contains the line of intersection of the planes and and which is perpendicular to the plane (View Answer Video)

**Question 5** : If a lines makes angle and with the positive directions of x-axis and z-axis respectively, then find the angle that it makes with the y-axis. (View Answer Video)

**Question 1** : The objective function is maximum or minimum, which lies on the boundary of the feasible region. (View Answer Video)

**Question 1** : An experiment succeeds thrice as often as it fails. Find the probability that in the next trials, there will be atleast 3 successes. (View Answer Video)

**Question 2** : A die is rolled. If E= (1, 3, 5), F(2, 3) and G= {2, 3, 4, 5}, find . (View Answer Video)

**Question 3** : An urn contains 3 white and 6 red balls. Four balls are drawn one by one with replacement from the urn. Find the probability distribution of the number of red balls drawn. Also, find mean and variance of distribution. (View Answer Video)

**Question 4** : If P(A)=, P(B)= and =, find . (View Answer Video)

**Question 5** : A speaks truth in 75% of the cases, while B in 90% of the cases. In what percent of cases are they likely to contradict each other in stating the same fact? Do you think that statement of B is always true? (View Answer Video)

**Question 1** : The volume of a cube is increasing at the rate of 9 cubic centimetres per second. How fast is the surface area increasing when the length of an edge is 10 centimetres? (View Answer Video)

**Question 2** : The normal at the point (1, 1) on the curve is; (View Answer Video)

**Question 3** : Find approximate value of (View Answer Video)

**Question 4** :

The total revenue in Rupees received from the sale of 'x' units of a product is given by :

The marginal revenue, when x=15 is :

**Question 5** : A balloon, which always remains spherical has a variable radius. Find the rate at which its volume is increasing with the radius when the later is 10 cm. (View Answer Video)